Effect of composition on spark plasma sintering of ZrB₂-SiC-ZrC nanocomposite synthesized by MASPSyn

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• 作者：S.M. Emami ; E. Salahi ; M. Zakeri ; ^{m_zakeri@merc.ac.ir" class="auth_mail" title="E-mail the corresponding author} ; S.A. Tayebifard
• 关键词：Zirconium diboride (ZrB2) ; Silicon carbide (SiC) ; Zirconium carbide (ZrC) ; Spark plasma Sintering (SPS)
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：111-115
• 全文大小：1737 K

文摘

ZrB₂–SiC–ZrC nanocomposites containing different contents of ZrC (6–20 wt%) were fabricated by spark plasma synthesizing and sintering method. Sintering mechanism was investigated by studying the displacement-temperature-time (DTT) diagrams which were obtained during spark plasma cycles. The flexural strength, hardness and fracture toughness were measured. The mean crystallite size of 77, 62 and 56 nm were calculated respectively for ZrB₂, SiC and ZrC phases based on the Rietveld method. The maximum relative density (99.8±0.1%), flexural strength (620±24 MPa), Vickers hardness (19.3±0.4 GPa) and fracture toughness (5.7±0.2 MPa m^1/2) were measured for the composite containing 15 wt% ZrC.